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Spatial variation in the diversity of the Rep gene from SARssφ1 phages from different sites in the North Atlantic Ocean in 2008. Sequences were de-replicated at 99% sequence identity with gaps, then a maximum likelihood phylogeny was constructed and layered on top of a map. Samples are color-coded based on location. The SARssφ1 phage genome is indicated with a white star, and the other two contigs used to design the primers are also shown in white.
